fig23

Figure 23. Selected video frames from parasternal long-axis 2D and color Doppler study demonstrating turbulent flow (TF) in the left ventricular (LV) outflow tract in an infant of a diabetic mother in (A). Continuous wave Doppler interrogation in (B) reveals a systolic pressure gradient of 39 mmHg (see the insert in B). The triangular pattern of the Doppler signal is suggestive of subaortic obstruction. Aorta (Ao) is labeled. Reproduced from Ref.^[19].